Improvement in warp-tension mechanism for looms



JL'F. RANDALL. WARP TENSION MECHANISM FOR LOOMS. No. 108.826,

Patented Nov 1, 1870.

rimo'megs.

JOSEPH F. RANDALL, OF WARREN, OHIO.

Letters Patent No. 108,826, dated November 1, 1870.

IMPROVEMENT m WARP-TENSION MECHANISM FOR LOOMS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, JOSEPH F. RANDALL, of Warren, in the county of Trumbull and State of Ohio, have invented a new and useful Improvement in Looms; and I do hereby declare that the following is a full, clear, and cxact'description thereof, which will enable others skilled in the art to make and use the same,

reference being had to the accompanying drawing forming part of this specification.

My invention relates to looms, and my object is to combine with the tension-roll certain other elements, separately well known, but brought together in a new manner, to especially adapt the loom. to weave bagging for gunny-clothor cotton baling. I

1 will first describe my invention, in connection with all that is necessary to a full understamliug thereof, and then clearly point it out in the claim.

In the accompanying drawing Figure 1 represents a view of the back side of the loom, giving a longitudinal view of the tension-cylinder.

Figure 2 is ar vertical cross-section of the loom, showing the threads representing the warp as it is taken from the spools, and the mode of giving it the proper tension.

Similar letters of reference indicate corres mmling parts.

My present improvement in looms relates exclusively to the mode of giving tension to the threads, and affording an uninterrupted motion to the loom by the use of the tension-cyliluler; it is, therefore, not deemednecessary to particularly describe the loom itself, as the loom is of the kind ordinarily used, with the exception of my tension-cylindcr, which takes the place of the common yarn-beam.

Iu weaving bagging for various purposes, especially that which is known as grimly-cloth, (used lbrbaling cotton,) great diliiculty has been experienced in giving the large and strong thread or yarn used as warp the proper degree of tension. The liability of the warp to slip is very great, audits slipping causes 'an unevenness in the fabric, which is very objectionable.

Herctofore this class of goods has been woven by Winding the warp onto the yarn-beam I-Iere another dliliculty is met with; the thread or yarn is so coarse that the beam can contain but a small amount, the

constant renewal of which requires .a. great deal of time and labor, leaving the loom idle much of the time.

In carrying out my invention, I dispense with the yarn-beam altogether, and substitute the cylinder A therefor.

-13 is the thread which represents the warp. The ,warp is taken directly from the spools or bobbins, which are placed ona suitable frame back'of the loom.

The surface of the cylinder A is made rough bybeing covered with perforated sheet metal, (of the grater kind,) or by means of sand oremeryqwaper, or in any other mannenthe object being to prevent the thread from slipping thereon. The cylinder rests on pivots in the common yarn-beam boxes.

0 is the common friction-band, and

l), the weight, arranged here on the end of the cylinder, to regulate the rotary movement thereof, and operating in the same manner as it would onthe old yarnbcam.

The warp is taken from the bobbin and carried over the roller 1' and down under the cylinder A, and then up over the roller F, from thence through the harness and reed, in the usual manner.

By this arrangement the thread or warp never slips,

and its tension is'kept perfectly uniform and the cloth;

woven is of even texture throughout. 7

Another very great advantage is, the loom may be kept in constant motion. The attendance of a little girl to renew the bobbins and splice the threads is all that is required to give a constant supply of warp to the loom, thus effecting a great saving in time by the use ofthe tension cylinder, as well as producing asupe'rior quality of goods.

.l-laving thus described my invention,

I. claim, as new and desire to secure by Letters lateuhv p The tension-roll A, having perfin'ated sheet-metal cover, rolls E F, weight D, and fric't-iou-bandO, all combined in a loom as described.

JOSEPH F. RANDALL.

Witnesses:

1). R. BURNETT, (J. 0. SULLIVAN. 

